20298+0941 JNN 282AC

 
 
20H 29M 48.41S +09 41' 19.3" P.A. 89 SEP 0.2 MAG 13.05,16.00 SP M4.5
 
 
Coord 2000
20298+0941
Discov num
JNN 282
Comp
AC
Coord arcsec 2000
20 29 48.41 +09 41 19.3
Date first
1996
Date last
2012
Obs
6
Pa first
89
Pa last
89
P.A. Now (θ)
89°
Sep first
0.2
Sep last
0.2
Sep. Now (ρ)
0.2"
Mag pri
13.05
Mag sec
16.00
delta mag (ΔM)
2.95
Spectral class
M4.5 (red)
Pri motion ra
+704
Sec motion ra
Pri motion dec
+092
Sec motion dec
Notes
N (See Notes)
Nature of this double is uncertain.
 
 
20298+0941 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 20298+0941 AST 2 AB 1995 1997 14 212 0.0 13.11 16.38 3.27 Y
Show 20298+0941 JNN 282 AC 1996 2012 6 89 0.2 13.05 16.00 2.95 Y <===
Triple system
3 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Delphinus
last precise pa
89.1
last precise sep
0.16
 
 
ORBITAL ELEMENTS
 
 
Period (P)538.6d± 0.1 Periastron (T)51022.7d (1998.571y)± 0.9 Semi-major axis (a)0.1037a± 0.0005
Eccentricity (e)0.558± 0.005 Inclination (i)145.4°± 0.6 Longitude of periastron (ω)12.2°± 1.5
Node (Ω)102.2°± 1.1 Note Grade3(1=Definitive, 9=Indet.)
Equinox2000 Last observation
label rho theta
2000-01-01 0.049 129.2
2001-01-01 0.145 255.8
2002-01-01 0.146 291.0
2003-01-01 0.045 87.7
2004-01-01 0.137 251.2
2005-01-01 0.152 287.0
2006-01-01 0.046 42.4
2007-01-01 0.129 246.1
2008-01-01 0.156 283.1
2009-01-01 0.055 5.4
2010-01-01 0.119 240.1
2011-01-01 0.159 279.5
2012-01-01 0.070 341.9
2013-01-01 0.108 233.0
2014-01-01 0.160 275.9
2015-01-01 0.086 327.0
2016-01-01 0.095 224.2
2017-01-01 0.160 272.4
2018-01-01 0.101 316.7
2019-01-01 0.082 212.6
2020-01-01 0.159 268.8
2021-01-01 0.115 308.8
2022-01-01 0.070 196.8
2023-01-01 0.156 265.2
2024-01-01 0.126 302.6
2025-01-01 0.058 174.1
2026-01-01 0.152 261.4
2027-01-01 0.136 297.2
2028-01-01 0.050 142.5
2029-01-01 0.147 257.3
2030-01-01 0.144 292.6

Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.

grafico orbita





grafico misure orbit6
Measures: green=micrometric, blue=interferometric, purple=photographic